we journey to 8th-century Basra to meet Rbia al-Adawiyya, the mystic who carried a torch and a bucket through the night, vowing to set fire to heaven and extinguish hell.
Al-Qushayri defended the inner life of Islam by insisting that mystical experience alone cannot validate itself --- and that the light always comes from beyond the self.
Ibn Ata Allah al-Iskandari transformed Islamic spirituality with his Book of Wisdom, rescuing the inner life from legalism with 261 timeless aphorisms.